Paper-cutting machine



(No Model.) I

' E. P. DON-NELL.

PAPER CUTTING MACHINE. No.-343,987 I Patented June '22, 1886.

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EDWVARD P. DONNELL, OF CHICAGO, ILLINOIS.

PAPER-CUTTING MACHlNE.

SPECIFICATION forming part of Letters Patent N0. 343,987, dated June 22,1886.

Application filed August 11, 1885. Serial No. 174,125. (No model.)

To all whom it may concern.-

Be it known that I, EDWARD P. DONNELL, a citizen of the United States,residing at Ghica' go, in the county of Cook and State of Illinois,haveinvented certain new and useful Improvements in Paper-CuttingMachines, of which the following is a specification.

This invention relates to paper-cutting machines; and it consists incertain peculiarities of the construction and arrangement of the same,substantially as will be hereinafter more fully set forth and claimed.

In order to enable others skilled in the art to which my inventionappertains to make and use the same, I will now proceed to describe itsconstruction and operation, referring to the accompanying drawings, inwhich- Figure 1 represents a side elevation of a portion of my cutter;and Fig. 2 is a horizontal section of the same,taken just above thetable.

A represents the frame of my cutting-machine, of any desired form,provided, as usual, with a knife-bar, B, which slides vertically inguide-slots a a in the frame. In all such machines it has been usual totake up the wear by setscrews passing through the front of the frame andbearing against a gib in the guideslot. This requires very carefuladjustment, and should one end be pressed in more than the other theknife-bar will jam and break the machine. To obviate this I form oneside of the slot at with an incline or bevel, asat a, and provide itwith a longitudinal dovetailed tongue, a upon which slides awedgeshapedgib, 0, having its upper end provided with a screw-threaded point, 0,which passes through the top of the main frame and is adjusted by a nut,c.

It will be evident that in operation tightening the nut 0 draws up thegib, and it is thrown outward equally at all points, thereby taking upall wear and preserving an exact uniformity in the widthoftheguicleslot, which prevents the possibility of accident.

The knife B descends past the face or edge of a stationary knife, 0,upon the table D, against which it cuts with ashearing cut. The wear ofthis knife in use and in grinding must be taken up, in order that .theknife shall out clean and even. To do this I form the adjacent edgeofthe table with an incline, d, and the knife 0 with an inclined back,d, while one end of this knife is provided with a bolt, 6, and nut e,passing through the frame. It will be seen by reference to Fig. 2 thatthis knife is by its bolt and nut drawn endwise, and the inclined backthrows it out evenly its entire length, enabling it to be very quicklyadjusted wit-h an accuracy which is not otherwise attained.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is

1. The combination, with the main frame ofa papercutter havingguideslots for the cutter-head, formed with one side inclined, of awedge-shaped gib placed in said slot and provided with anadjusting-screw at one end, substantially as and for the purpose setforth.

2. In a paper-cutter, the combination, with the main frame having avertically-sliding knife-bar and a table formed with an inclined edge,of a stationary knife formed with an inclincd back and provided with abolt and nut at one end to adjust it, substantially as and for thepurpose set forth.

In testimony whereof I affix my signature in presence of two witnesses.

EDWARD P. DONNELL. -Witnesses:

W. O. MOARTHUR, W. S. MOARTHUR.

